©1999 Navia Aviation AS 21833-3.4 Main cabinet
OPERATING MANUALNORMARC 7013
INSTRUMENT LANDING SYSTEM
3-7
3.3 Local Keyboard/Display Operation
Figure 3-3 The local keyboard/display
3.3.1 The menu structure.
The front panel menu system includes a 20x4character LCD with 7 dedicated pushbutton
keys. The system is organised as a top-down menu tree-structure where the main menu is the
default entering point.
The main menu screen has three menu-options. The options are divided into the three access
levels; level 1 with basic readout functions, level 2 with test and control functions and level 3
with permanent system parameter settings and configuration changes.
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